Grubbing machine



D. A. JOHNSON July 3 1928.

GRUBBING MACHINE 3 Sheets-Sheet 2 INVENTOR. .Daw'a flJ'o/wsoxz Filed March 29, 1927 ATTORNEY.

- 1,675,413 D. A. JOHNSON GRUBBING MACHINE Filed Mar h 29, 1927 5 Sheets-Sheet 3 INVEN TOR.

DaVioflJo/msM Vii/M44 A TTORNE Y.

. not they'will be weakened suflicient for the be more. fully explained. v.

Patented July 3, i928.

mm aiaonnsomor BELVUE, Kansas.

chine for trees or the like. a The object of myinventionris to providea machine for severin theroots of a connecting itfrom t e earth.

A further object of. my. invention is provide a machinethat will function regard;

less of frozen ground or other conditions. a

A still further object of-my invention is A Still further object of my inventionisto provide a machine for grabbing trees or the like eliminating. the necessity .of removing the earth-asis commonly practicedjheretm A still ,furtlier object of, my invention is to provide a machine having a plurality of severing members positioned in. close pron imity to engagewith the varying sized roots, and whether the roots be severed entirely or tree to fallwhereby moved. i These andother objects will hereinafter the stump may be re Referring to the drawings: in Fig.1 is a plan viewof the drill, bit sup poi-tingmeansg. 4. Q M a Fig. 2 is a transverse view of Fig. ,1. 3 Fig. 3 is an enlargedyfragmentary. end

viewtaken along line 3+3 in Fig. 2, parts removed, for convenience of illustration.

Fig. 4 is an enlarged end View of the drill bit driving means. r y .1

Fig. 5 is an enlarged fragmentaryyside view ofthe rack and gearactuating means forthetravel of the drill. v U 1 Fig. 6 is a perspective view of the machine in operation.

The grubbing machinefherein disclosed consists ofa frame comprisingtwo sidebars 1 connected attheir upper ends by a tie bar 2 the ends of which are bent to a right angle as at A to engage snugly withthe inside of the bars and are attached firmly "by means of cap screws 3. The opposite or: lower ends by means of cap screws fil.

invention mate; as. abtag ma- I as sever-T cnunnmc Madame P Applicatioiifl led new; 20, 1627. fleriallo. weasel l l As a bracing means forthe frame, I have provided two diagonally positioned bars 6 the ends of which are rigidly attached. to the corners of the frame. Positioned between the bars 4: and trunnioned therein are a plurality of worm gears 7, the said gears being rotated worms 8 positioned on opposite sides thereto and in mesh therewith. The

saidworms are trunnioned to the lower end of the side bars .1 as at C. The worms are geared together at both ends by gears 9 whichare rigidly attached to their respective spindles. 10, said spindles bein integral with the worms. As an inclhsing means for the worm and worm gears I have provldeda plate 4' attached to both sides of bars 4:by means of cap screws renderin it oil ti lit the worm and gears being packs in bar r Trunnioned on, the upper ends of the side bars 1 is a shaft 11 as. which is attached a driving pulley 12, said pulley to receive a belt from the drive pulley of a tractor or other motive power as shown in Fig. 6.

' Sprocketsl? arerigidly attached to both ends said: shaft as actuating means for the worms through the medium of chains 14 i i by which means the "plurality of bits 15 are caused torotate, functioning as hereinafter described. i

will be understood that the two chains M en age the sprockets on separate worms, andt e two worms being geared together as heretofore described the power is equally applied to both ends thereof. Later-ally and movably positioned between. the side bars 1 is a conve ing memberlti, the said member beinga c annel and having a plurality of laterally extending. slots 16 in one side thereof equally distributed longitodinallyto receive the shafts 17 which are integrally connected to the drillbits 15, the said shafts rotatably engaging therein. As aretaining andcarryingmeans forthe shafts when the conveying member reciprocates'I have provided and attached rigidly on the ends thereof a sleeve member 18 the said member being fastened by means of a set screw, the threadeda erture for which is shown at 19, the said s eeve rotatably engaging between the walls of the channelled conveying member.

As ameans to retain the shafts in operative position within the channelled conveying member I have provided a member having similar slots to those in the side of the conveying member to engage with the said shafts in reversed position. The said member is rigidly attached by means of cap screws 21 shown in Fig. 2

As a means to convey the beam from one end of the frame to the other carrying with it the bits, I have provided a bifurcated block 22 having a right'angle bend as at D on the outer ends thereof functioning as bearings for a train of gears hereinafter described.

The bifurcation of the block receives the side bars 1 and extends over for rigid engagement with the ends of the beam to which it is attached by means of cap screws 23. Rotatably positioned on both sides of the beam and trunnioned in the block are two shafts 24 having gears 25 to engage with arack 26. The said gears are connected for simultaneous rotation by a train of gears as shown in Fig. 5; the gears 27 are atgrubbin g tached to the ends of the shafts and intermediately positioned are two gears 28, by which means the rack gears 25 will rotate in opposite directions to uniformly convey the beam to'and fro in the frame.

On oneend of one of the rods 24 I have placed a hand wheel 29 having "a handle 30 positioned thereon, by which means the beam is conveyed manually. Spaced from the lower end and rigidly attached to the side bars 1 are stop blocks 31, the object of which is to space apart the two bearing points for the shafts of the bits. It will be understood that the said bit shafts are square as shown in Fig. 3, as a means for sliding engagement through the worm gears 7 while said gears are rotatingthe bits.

By the rack mode of operation when the machine is properly positioned, the bits may be drawn upward or downward simultaneously while the worms are in action revolving the bits,or during the period of idleness.

In Fig. 6 is shown a tractor to which the machine is pivotally connected by arms 32 that are rigidly connected to the tractor, the machine pivotally engaging in the outer ends as at 33. As a means to rock the frame to different angles I have provided a pair of bars 34. pivotally connected to the tractor and positioned to engage with both sidesof the frame as shown in Fig. 1. The said bars slidably engage in the slot of a member 35 the said member being rigid- 1y attached to the side bars 1. When the frame is rocked to adesired angle it is attached by means of set screws 36 which threadedly engage in the top of the slotted member and adapted to bind on the upper edge of the bars.

In Fig. 6 is shown a stump of a tree 37 having roots extending therefrom, and on one side is a slot 38 which is cut by the series of bits in their downward movement toward I maybe removed.

Such modifications may be employed as lie within the scope of the appended claims.

Having thus described my invention, what I'claim as new and desire to secure by Let- 'ters Patent is 1. In a grubbing machine, in combination with a ower actuating means, a frame having a s aft rotatably mounted on the upper end thereof, arms extending from the power actuating means in which the shaft is rotatably mounted and on which the frame will swing, pivotally connected bars on the power actuating means, a clamping mea f .v

on the lower end of the frame to engage along said bars whereby the desired angle of the frame is fixed, a beam positioned between the sides of the frame, a toothedrackj on the rear and front of bot-hside members of the frame, a pair of gears trunnioned on both ends of the beam to engage with the. said toothed racks, a train of gears connecting the first said gears as equalizing means for the rotation of the firstsaid gears to cause a reciprocating travel of the beam, manual means to rotate the gears, a plurality of drill bits positioned in close working relation and equally spaced across the frame, the

upper ends thereof rotatably engaging in the 71 beam and thrust longitudinally thereby, the shafts of the bits being square, worm gears trunnioned on the lower end of the frame,

- a square aperture axially extending through the gear to slidably engage the shaft as rotating means for the hits while sliding longitudinally therethrough, worms trunnioned to engage on both sides of the gears for si-' mult-aneous rotation thereof, means to rotate the Worms, allsubstantially as shown. 2. In a grubbing machine, a frame'comprising two side bars with toothed racks on the front and back of each thereof,=a worm and worm gear housing to connect said bars at one end, a bar member to com nect the opposite ends so that the side bars are parallel, diagonal bracing for the frame, a beam carried by gears engaging on said racks, means to rotate'the gears for an upward and downward movement of the bar, a luralit of drill bits having stems of consi erable ength and equally distributed between the side bars, the stems being square sectionally, the upper ends thereof trunnioned in .the beam in such a way that the said stems are thrust outward and retracted thereby, a worm gear for each of the stems trunnioned in thehousing, a square aperture axially positioned in the gear to receive equalizing means therefor, a driving means the stems slidably engaging therein and funcon one end of each of the worms, and a powtioning as rotatable means therefor, a worm er actuating means for the mechanism, all 10 threadedly engaging on opposite sides of the as, and for the purpose described.

5 worm gears as motive power for the rotation In testimony whereof I afiix my signature, thereof simultaneously, a gear on both ends of each of the Worms to engage as rotary DAVID A. JOHNSON. 

